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Nonequilibrium dislocation dynamics and instability of driven vortex lattices in two dimensions

Igor S. Aranson·Stefan Scheidl·Valerii M. Vinokur
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Abstract

We consider dislocations in a vortex lattice that is driven in a two-dimensional superconductor with random impurities. The structure and dynamics of dislocations is studied in this genuine nonequilibrium situation on the basis of a coarse-grained equation of motion for the displacement field. The presence of dislocations leads to a characteristic anisotropic distortion of the vortex density that is controlled by a Kardar-Parisi-Zhang nonlinearity in the coarse-grained equation of motion. This nonlinearity also implies a screening of the interaction between dislocations and thereby an instability of the vortex lattice to the proliferation of free dislocations.

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BibTeXRIS

Igor S. Aranson, Stefan Scheidl, Valerii M. Vinokur. 2000-02-21. Nonequilibrium dislocation dynamics and instability of driven vortex lattices in two dimensions. https://doi.org/10.1103/physrevb.58.14541

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